Adnan H Fond Du Lac , WI July 05, 2025 Appliance: Samsung Washer WF42H5200AP/A2-01 Samsung Washer Wf42h5200ap/A2-01: De1 code on samsung front loader. How to replace Washer Door Lock Switch Assembly. DE1 code - Samsung washer - very likely door lock switch - ordered it, replaced in about 15 mins - all good. Thank you guys, easy to find the correct part on their website. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes